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Modern connectivity, backed by classic sound

When you want your music to sound its best, you just can't beat a good two-channel stereo. Connect your speakers to the Harman Kardon HK 3770 and this powerful receiver will bring those tunes to life the way they were meant to be heard. Whether you're listening to songs from a CD, turntable, networked computer, or a smartphone, this receiver has the connectivity to play them and the brawn to bring out their dynamics and detail. Digital inputs even allow it to improve the sound of TVs and streaming media players like Apple TV®, too. With so much versatility, this receiver goes above and beyond old-school models, while retaining classic Harman Kardon sound.

Clean sound from a new "green" technology

Harman Kardon has been working to make their receivers more energy efficient without compromising sound quality. The HK 3770 represents the fruits of their labor. It utilizes Harman Kardon's GreenEdge™ technology. Rather than redesigning the high-current Class AB amplification stage, this receiver features a new digital power supply. Unlike conventional analog power supplies, this new digital design uses less energy, fewer raw materials, and produces less heat. The result is a lightweight, efficient, eco-friendly receiver that delivers the same sonic benefits we've come to expect from this audio innovator.

Enjoy wireless music from smartphones, tablets, and computers

The HK 3770 offers two ways to stream music wirelessly. Built-in Bluetooth lets you stream tunes from a smartphone, tablet, and even some computers without a home network. It's the easiest way to enjoy your digital music collection with room-filling sound. If you have a large digital collection stored on a networked computer or NAS, the HK 3770 is Internet-ready. Connect it to your network router and stream music from your computer over your wireless home network. You can also listen to thousands of free Internet radio streams from stations around the world, going far beyond the reach of the built-in AM/FM tuner. Download the free Harman Kardon remote app to your iOS® or Android™ device and use it to control the receiver. App control requires a wireless home network and a wired connection between your receiver and your network router.

Connect your iPhone or USB thumb drive

The USB port on the HK 3770's front panel lets you plug in your iPhone®, iPod®, or iPad® to listen to music. This connection bypasses the device's digital-to-analog converters in favor of the receiver's high-performance DACs. That means you'll get smoother sound with more detail than your iPhone can deliver on its own. You can also use the receiver's remote to control playback with connected Apple® devices. The USB port is also great for playing digital music files on thumb drives by popping them into the USB port.

The sound solution for the less-is-more movement

On one hand, you want something that sounds much better than an iPod® or Bluetooth® speaker. On the other hand, you want something less complex than a surround sound system. You'll find your sweet spot in a stereo receiver. In addition to being easy to set up and use, many now offer Internet radio and other network music options. Add your music source and two speakers, and you're ready to relax and enjoy your tunes. You might even connect your TV for improved sound with movies and shows.

Product Research

Audio Section

Output Power: The Harman/Kardon HK3770 stereo
receiver features a 120 watt x 2-channel (8-ohms, 20Hz-20kHz, THD 0.07%) amplifier for
great sound quality with little distortion even at high volumes.

High-Resolution 24-bit/192kHz DAC: This stereo receiver is equipped
with a 24-bit/192-kHz DAC for excellent sound quality reproduction that is
natural sounding.

Harman Volume: Harman volume is an advanced digital signal processing
technology to control playback volume. It evens out the volume level on
everything you watch, improving your listening experience. Once you choose the
volume level, Harman Volume does the rest. It helps you avoid volume increases
from commercials, volume differences when you change channels or switch sources,
and brings out the dialog.

Analog Inputs/Output: The Harman/Kardon stereo receiver features five
analog stereo RCA inputs to connect up to five audio components, and one stereo
RCA record output to connect to a CD-recorder and other recording device.
Included in the five analog inputs is a Phono input (MM) for vinyl playback.

Digital Inputs: The HK3770 receiver is equipped with two optical
(toslink) digital inputs and one coaxial (RCA) digital input for connection of a
TV or media streaming device.

Phono Input: In addition to the five analog inputs, the stereo
receiver is fitted with a Phono input (MM) for vinyl playback.

A & B Speaker Terminals: This receiver features two sets of speaker
outputs (A & B), each with binding-post terminals. You can independently turn on
or off each pair of speakers, as well as play both pair of speakers. The speaker
pairs are wired internally in parallel. These binding post terminals will accept
bare wire (up to 10AWG), pin-connectors, and banana plugs (single or dual).

Subwoofer Output: The stereo receiver is equipped with a
mono subwoofer output for connecting a powered subwoofer. The output is full-range, so you will need to connect a powered subwoofer with a built-in crossover.

Headphone Jack: There is a full-size (1/4") headphone jack on the
front panel. When headphones are plugged in the speaker outputs are
automatically muted.

Network & Tuner Functions

Ethernet LAN Port: The H/K stereo receiver is fitted with a
RJ-45 Ethernet (LAN) port to connect the receiver to your home network to access
your DLNA music server or Internet Radio.

Internet Radio (from vTuner): You can also listen to Internet radio
stations using the vTuner
Internet Radio Station database service particularly customized for this unit,
providing a database of numerous radio stations around the world. You can search
for Internet Radio stations by Location, Genre, New, Popular, or Podcast. You
can store up to 30 of your favorite stations.

DLNA Certified: The HK3770 is
DLNA (Digital Living Network Alliance)
1.5 and Windows 7/8 compliant for audio networking. This means it's easier for
you to access and enjoy digital music stored on your PC. Compatible music files
include MP3 (32-320kbps; 8-48kHz) and WMA (5-192kbps; 8-48kHz). You can use your PC to
play music content through your audio system, or use the H/K receiver to browse
and play music files on computer's hard drive. You can control
playback of your streamed audio files from the network receiver's remote
control. The receiver also supports ID3-Tag and META tag information so song
title, artist name, and album name can be displayed from the unit's front-panel
display.

AM/FM Tuner: The Harman/Kardon stereo receiver features a built-in
AM/FM tuner with manual, seek, and preset tuning (auto/manual). You can store up to 30 AM/FM
presets (in any combination). You're able to scan through these presets
(5-seconds each) to help
you search for your favorite music. You also can tune directly to a station
using the numeric keypad on the included remote control.

USB/iPod Integration

Front-Panel USB Port: This stereo receiver is equipped with a
front-panel USB (type-A) port that allows you to enjoy playback of MP3
(32-320kbps; 8-48kHz) and WMA (5-192kbps; 8-48kHz) music
files from a USB mass storage class memory device; such as select Android
smartphones (Froyo/Gingerbread OS only), portable MP3 players, or USB
thumbdrives (not compatible with USB HDDs). The USB device must be formatted in
FAT or FAT32. Using the unit's front-panel
display and included remote control, you can browse your stored music files on
your connected USB memory device. USB portable audio devices that can be charged
via USB will be charged when plugged into the network stereo receiver's USB port
(5V/0.5A).

iPod/iPhone Direct: The USB (type-A) port on the front-panel provides
convenient connection for your iPod/iPhone so you can listen to your stored
music and music apps through the H/K stereo receiver. The iPod/iPhone USB
digital connection means that the digital audio signal from your iPod/iPhone is
transmitted directly to the system, minimizing noise interference and allowing
use of the receiver's DAC, not the DAC in your iPod/iPhone. This results in more
precise sound reproduction. You can choose to control your Apple device from its
clickwheel/touchscreen or from the receiver.. Basic playback functions (such as Play/Pause,
Previous/Next Track) can be controlled by the receiver's remote. Song/artist
information on your iPod/iPhone will display on your connected the unit's
front-panel display. Your iPod/iPhone's battery
will be charged while connected to the receiver. Using the Lightning- or
Dock-cable that came with your Apple device to connect directly to the H/K
stereo receiver, iPod/iPhone compatibility is as follows (as of 9/25/2014):

Apple Device

Generation

Tested Version

Media Type

Control Type

Display Type

Charge

Audio

Video

Remote

iPod/iPhone

Artist/Song Text

Track Info

iPad

1

5.1.1

Y

N

Y

Y

Y

Y

Y

2/3

8.0

Y

N

Y

Y

Y

Y

Y

4/air

8.0

Y

N

Y

Y

Y

Y

Y

mini

8.0

Y

N

Y

Y

Y

Y

Y

iPhone

2G

3.1.3

Y

N

Y

Y

Y

Y

Y

3G

4.2.1

Y

N

Y

Y

Y

Y

Y

3GS

5.1.1

Y

N

Y

Y

Y

Y

Y

4

7.1.2

Y

N

Y

Y

Y

Y

Y

4S

8.0

Y

N

Y

Y

Y

Y

Y

5/5C/5S

8.0

Y

N

Y

Y

Y

Y

Y

6/6+

8.0

Y

N

Y

Y

Y

Y

Y

touch

1st

2.2.1

Y

N

Y

Y

Y

Y

Y

2nd

4.2.1

Y

N

Y

Y

Y

Y

Y

3rd

5.1.1

Y

N

Y

Y

Y

Y

Y

4th

6.1.2

Y

N

Y

Y

Y

Y

Y

5th

8.0

Y

N

Y

Y

Y

Y

Y

nano

2nd

1.1.3

Y

N

Y

Y

Y

Y

Y

3rd

1.1.3

Y

N

Y

Y

Y

Y

Y

4th

1.0.4

Y

N

Y

Y

Y

Y

Y

5th

1.0.2

Y

N

Y

Y

Y

Y

Y

6th

1.2 PC

Y

N

Y

Y

Y

Y

Y

7th

1.02 PC

Y

N

Y

Y

Y

Y

Y

classic

80GB

1.1.2

Y

N

Y

Y

Y

Y

Y

120GB

2.0.1

Y

N

Y

Y

Y

Y

Y

160GB

2.0.4

Y

N

Y

Y

Y

Y

Y

Note: Apple iPod/iPhone software updates may change
functionality results. If you download a newer software version, you may
need to reset the unit and your iPod/iPhone to regain functionality. If this
doesn't work, you may need to wait until a newer software update is
available.

Remote Control

Built-in Bluetooth: The Harman/Kardon receiver features built-in
Bluetooth with support for profiles A2DP 1.2 and AVRCP 1.3. You'll be able to
wirelessly stream stored music and music apps from your Bluetooth-enabled Apple
device, Android smartphone/tablet, portable audio player, laptop, or PC to the
H/K receiver. You will also be able to control basic playback functions
(Play/Pause, Fast Forward/Rewind, Previous/Next Track) using the receiver's
remote control. Advanced music operation will still need to be handled from your
Bluetooth-enable device. There is no song/artist information display on the
receiver's front-panel display. Continue to use your Bluetooth device's screen
to view song/artist info.

Note: Due to the differences in Bluetooth technology, some
Bluetooth enabled devices may be incompatible, function improperly, or may
not support all features when used with the H/K receiver.

Remote Control: The HK3770 comes with an IR remote control for
wireless operation of the receiver and your connected USB or iPod device.

H/K Remote App: Downloading the free Harman/Kardon Remote app from the
iTunes App store onto your Apple iOS (5.0+) device or from the
Google Play Store onto your Android (2.2+) device lets you control the
HK3770 receiver from your smartphone or tablet device. You'll also be able to
control your Apple iOS or Android device's stored music from the Harman/Kardon
Remote app.

Source Selection: You'll be able to access and select
all of the receiver source inputs (Analog 1-5 inputs, Phono input,
Optical/Coaxial, DLNA,
vTuner, Bluetooth, USB, or iPod) through your Apple iOS or Android device with the
Harmon/Kardon Remote app installed.

Audio Settings: You have control of the receiver 's
Volume and other audio adjustments through the Harman/Kardon Remote app and
your Apple iOS/Android device.

Music Control: You can control all the music you have
stored on your compatible Apple iOS/Android device through the Harman/Kardon
Remote app. You'll be able to search your music by Song, Artist, Album,
Playlist, and Genre. You also get basic playback functions such as
Play/Pause, Previous/Next Track, Fast Forward/Rewind, and Repeat/Random. To
access music apps, you'll need to exit the Harman/Kardon Remote app and
select your desired music app on your iOS or Android device.

IR Input/Output: There is one minijack (3.5mm) remote input and one
minijack (3.5mm) remote output on the rear panel of this unit. If the receiver
is placed behind a solid or smoked glass door, the obstruction may prevent the
front panel IR sensor from receiving commands from the remote. If the unit is
positioned so the front panel IR sensor cannot receive commands from the remote,
an optional IR repeater system (sold separately) may be connected to the Remote
IR In jack and positioned to accept commands from the remote. The Remote IR Out
jack can be connected to the remote input jack of compatible equipment to relay
commands to that equipment.

Trigger Output: This minijack (3.5mm) output sends a 12-volt DC
turn-on signal to another component that accepts a 12-volt trigger, such as a CD
player or powered subwoofer.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to
find elsewhere. That's because we have our own in-house Product Research
team. They verify what’s in the box, check the owner's manual, and record
dimensions, features and specs. We stay on top of new products and technologies
to help people make informed choices.

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All Work, No Play

Its been 25 years since I've purchased a preamp/amp set or receiver in this case - things have changed a great deal. This receiver has all the latest tech incorporated in it, and the sound matches the tech level - outstanding. Its not intuitive to use for the older crowd but once you spend the time understanding how things work, it has some great features / benefits.

Pros:Outstanding features, up to speed with related products (smart TV's, DVD/CD players)
Plenty of power
High quality appearance

Cons:Only compatible with Apple products - would like to see Anroid compatibility too
No wireless option for connectivity / networking

Sharp and clean

The receiver is just what I wanted: a non-surround, simple machine. Too many other receivers had many more features than I would ever use. This plays the radio and all my bluetooth phones and pads. The look is very sharp, it is super simple to use, and it sounds great (most important).

Harman Kardon HK 3770

I've had this HK receiver for about 3 weeks now. It was easy to set up with a CD player and the TV (stereo output.) It was easy to connect it to my home (wired) internet via ethernet cable and the Bluetooth connected quickly. Most importantly, it sounds good. As a couple of other reviewers have noted, there is one significant drawback that prevented me from giving it 5 Stars. The buttons on the receiver are very small and hard to see. Somewhat irritating is that the labels for the buttons are also small and hard to see. If you plan to put this in any sort of cabinet that would cast a shadow on the front of the unit, forget it, you won't be able to see what you are doing. You are basically completely dependent on the remote, which is, thankfully, laid out fairly well. As another reviewer mentioned, guard the remote with your life, because if you lose it or it breaks, you have a big problem.

HK 3770

Good clean sound with nice features such as blue tooth, phono input, sub woofer out put etc. Works well w our Bose speaker set up. Good separation

Pros:Clean sound, nice crisp base and clean clear treble. a lot better than what I expected from a 20-20,000 unit

Cons:Doesn't seem to have left-right balance, at least I haven't figured it out yet. A little scary that you have to have the remote to run it, my kids are good at losing them. More info from the mfg on function and use of control options would be helpful. Miss my EQ capabilty I had on our old system but the HK is pretty good with out it

Awesome Receiver

I love this receiver. It brings old school power to modern devices with the Bluetooth capability. It brought my Boston Acoustic tower speakers to life! Sleek design and easy operations. I wanted this for my music, but our TV sounds great without surround sound.

Pros:Pure HK power and Bluetooth capability.

Cons:Little hard to see some of the function buttons on the face of the unit inside the entertainment center.

Excellent!!

Coming from a 2-channel dinosaur, this receiver rocks. Well balanced tone without any adjustments, Bluetooth works as advertised with an iPad, radio reception is great, and can satisfy the vinyl soul as well. Really don't need the sub with this machine; drives my Klipsch RF 82s smooth as a greasy goose on a hot rock. Thanks Crutchfield & HK!

Harman Kardon HK 3770 Review

Great looking and sounding amplifier! Easy to set up and operation is simple and to the point. Though the unit weighed much less than I anticipated, the sound leaves nothing to desire. Paired this with two Polk RTi A7's and the highs and lows are extremely clear and the unit delivers plenty of punch.

Great Stereo Receiver

This amp sounds great and has plenty of power to push our old Cerwin Vega speakers with 15" woofer, 8" mid and 3 tweeters. It gets way too loud before any perceivable distortion. One small gripe is the lack of tweakability: not much in the way of customizing EQ. There also aren't any different modes, like for movie or music settings. But, so far we are loving the sound anyway.

Pros:Great sound. Plenty of Power for large speakers. Looks good. Good price. All the inputs we needed. Bluetooth works great.

Great so far

I have this receiver paired with two infinity primus floor standing speakers and an infinity primus sub. I was primarily interested in a system for music so the 2.1 setup works for me. I am still amazed at the clarity and detail this amp reproduces even at high volumes. Plenty of options for inputs is nice, though I mostly use one Aux in from my computer. Bluetooth is a plus though and works very very easily. I mostly listen to electronic, metal, alt rock, and oldies, all of which sound great. Don't regret my purchase at all.

Excellent and Versatile

I have been enjoying this receiver about a week now. I am not completely tech savvy when it comes to things like networking a million devices but I can say that as far a bluetooth is concerned and and the basics of an old time analog receiver, I am very happy. I only have bluetooth devices and a couple hundred LPs which is what I use most. LPs sound great on this system. I don't have CDs but I am sure they would sound great too. I also use it for sound on my television, so I have great control and clarity when it comes to watching movies and such. Each input remembers it's own settings in regards to bass and treble which is also very cool. I do recommend this product to anyone who wants a great quality receiver but is not interested in having a big surround set up yet would like lots of new tech options. I plugged in my internet into the back of the unit from my router and now have many hundreds of digital radio channels from every corner of the world. There is much to say so I recommend looking at the specs and if you do not know a lot about networking, you may need to find a friend that does to help you out with sharing your computer files wirelessly with the receiver. Thanks.

Pros:Pros are the massive versitility and new technology while getting away from the surround sound thing and getting back to the basics of a STEREO two channel high powered receiver. For me a phono input is always one of the essenital requirements. I cannot imagine this unit being a dissapointment to anyone.

Cons:In regards to the cons of this unit, it is heavily dependant on the remote control. There is precious little you can do without the remote in fact. That includes adjusting bass, treble,and even balance, not to mention all the higher technologies that cannot be adjusted without the remote control. So, if you buy this unit, you will need to treat the remote with a lot of care as you are going to need it to work throughout the lifetime of the receiver.

Harman Kardon HK 3770

I grew up with 2 channel stereo's. Raw power and everything was big. Old school meets new technology. Everything from the past, but better. This HK is simple to hook up, 15 minutes maybe. Simple to use and really kicks!! This is used for outdoor sound paired with NHT's, WOW!!

Pros:Plenty of power. Simple easy, out of the box music in 15 min or less.